#container div {
	background: black;
}

#container {
	position: absolute;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
	overflow: hidden;
	z-index: 1;
}

#menu {
	position: absolute;
	top: 300px;
	left: 300px;
	z-index: 2;
	background: grey;
	opacity: 0.8;
	padding: 25px;
}